Running on Empty: The Sneaky Way Mild Dehydration Steals Your Focus Before You Feel Thirsty
You don't need to be stranded in the desert to feel the effects of dehydration. Losing just 1-2% of your body water — the kind that happens between your morning coffee and lunch — can quietly dull your concentration, drain your energy, and sour your mood. Here's the science, plus simple benchmarks to keep you ahead of it.